Bearing for gyroscopic apparatus.



G. A. ROSSETER & E. A. THORNE.

BEARING FOR GYROSCOPIC APFARATUS.

APPLICATION FILED MAY 6. I912.

Patented. Jan.23,1917

3 SHEETS-SHEET I.

\' Jay efioms- [(gsS/TER v EDWARD A TIIORNE WITNESSES mn mrofls G. A. ROSSITER & E. A THORNE.

BEARING FOR GYROSCOPIC APPARATUS.

APPLICATION FILED MAY 6. 1912.

1,211 fig Patented Jan. 23, 1917.

3 SHEETS-SHEET 2- GEORGE A, Ross/T58 WlTNESSlES EDWARD A THOR/V5 g INVENTOR 3 ATTORNEY G. A. ROSSITER & E. A. THORNE. BEARING FOR GYROSCOPIC APPARATUS.

APPLICATION FILED AY6. 1912.

1,21 3,692., Patented Jan. 23, 1917.

3 SHEETS-SHEET 3.

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WITNESSES INVENTOR 5 %Z.: M ATTORNEY oar-ran see new oration.

Gnonen A. BOSSITER AND EDWARD A. rename, or 'BnooKLYn, new roan, assronons T FRANK G.

camera, on NEW YORK, n. Y.

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neiacee.

Specification of Letters Patent.

Patented an. as, new.

To all whom it may concern.

Be it known that we, GEORGE A. RossrrnR, a citizen of the United States, and EDwARi) A. THoRNE, a subject of the King of Great ,1, Britain and Ireland, and both. residing in the city of Brooklyn, county of Kings, State of New York, have invented anew and useful Bearing for Gyroscopic Apparatus, of. which the following is a specification.

Our invention relates to a structure as used in a gyroscopic compass or meridian finder in which a gyroscopicdisk, mpunted in frames oppositely pivoted in one another to permit freedom of movement in any direction, is employed.

It is obvious that where great friction in the supporting bearings exists, it is difficult to obtain an accurate reading, as fromthe nature of gyroscopes the mass must be great, 20 and the disk must revolve at a high speed to securethe desired result.

In the form shown herewith, the gyro scopic disk is supported in frames and mounted above the center of gravity, and it will therefore, maintain a perfectplane of rotation, and if it is perfectly balanced and has freedom of movement in all directions with its plane will adjust itself to the plane of least resist- 3Q ance.

shown, we mount the gyroscopic disk in a disk holding frame provided with bearings toreceive the shaft or pivots of the disk. The disk holding frame is provided with pivots in a horizontal plane and is free to move in a vertical plane-or about a'horizontal axis in another frame,

to move in a horizontal direction or about a vertical axisJ so 7 Our invention is following specification,

thereof is illustrated in within which,

' Figure 1 is an compass provide further described in the andone embodiment the drawings hereelevation of a gyroscopie d with our friction reducing apparatus. Fig. 2 is a sectional view on the line 22 of Fig. 1. Fig. 3 is an enlarged detail view of the pivots and their compensatingdevice. Fig. dis a plan view of the same. Fig. 5 is a diagrammatic view showing a method of electrical compensation. p

Referring to the drawings, 1 is the usual form of'gyroscopic disk, rotated by a motor as 2, the electrical connections for supplying of revolution east and'west,

which is free the current not being shown.

s mounted scopic disk The gyroin a frame 3, having 'hubs 4, in which are secured the pivots 5 and 5 Mounted on the sai thereto are cylindri d pivots and secured cal armatures (y-and 6 of some high magnetic metal. The pivots 5 and 5 of the frame 3 pass through openings 7 in a frame 8 of non-magnetic metal,

the openings 5 and 5 Secured to the being larger than the pivots frame 8 by means of screws 9, are the brackets 10, in which are mounted the pivot blocks 11, as sh the purpose of "electric m pivot blocks 11 can be ma other non-conducting, material.

n in Fig. 3. For

do of agate or The frame 8 is provided with cars 12, to

which are secured by means 0 the electromagnets 14 and windings 15, in saddle pieces 16.

electromagnets of electrical energy, the-arm and 6 willbe attracted by the energized saddle pieces 16, rent flowing adjusted, the attracti 16 for the armatures exactly balance the combined weight-of the n through the coils 15 is nicely d if the strength of the ouron of the saddle pieces 6 and 6 can be made to disk 1 with its motor 2, the frame 3, the armatures 6 and 6 and the pivots 5 and 5,

without the armatures 6 and 6 contact with the saddle pieces coming into 16.

As the frame 3 with its pivots and disk- Would be in a state of suspension, the only function of the pivots 5 and 5 would be that of positioning made very and they could, therefore, be

light and sensitive.

In actual practice we have. found it advisable' to regulate the current to make the attraction, of the magnets 13 for the armatures 6 an balance all of the weight as set forth above withthe exception of about one-half ounce,

the two pivots pivot blocks 11 To provle against the contingency sudden shock,

which would be taken up by 5 and "5 and their respective and 11.

of a which mightbend out of shape the lightly constructed pivots 5 and '5,

and render compression, is about equal mount the pivot blbcks 11 in oarryin L 17 slidably mounted in ways 18 of t ets 10 and springs that the sum of their resistance the whole apparatus useless, we

blocks ebrack- 19 of such resistance to to the difference between the sulation the said weight borne by the magnetic means and the total weight of the parts.

On ribs 19 of the bracketslO, we mount resistance coils 20 by means of the pieces 21, the carrying blocks 17 having rolls 22 supported by a spring plate '23 secured thereto and insulated therefrom. If the apparatus should receive a sudden shock, the magnets 13 being connected to a source of electrical energy through the resistance coils 20, the carrying the springs 19, the contact rolls 22 would roll along the coils 20, cutting out some .of the resistance between the source of energy and the electromagnets and thereby the electromagnets 13 would receive a greater cur- ;rent and would thus create a magnetic field with a greater number of magnetic lines, in consequence of which, the armatures 6 and 6 would be attracted to the saddle pieces 16 to a greater extent and would automatically compensate and balance. the effect. of the shock. It is obvious that this compensation can be accomplished in a number of ways, and we show here only one of the preferred forms.

The frame 8 is mounted in a secondary frame 24 of non-magnetic metal, with a similar anti-friction bearing as described above. The frame-24 is positioned by the bottom thrust bearing 25 and a pivot 26 on .the frame 8, and the upper guide bearing 27 and the pivot 28 formed on the rod 29 secured to the frame 8. The pivot28 is turned down to form the teat 30 which carries the usual reading plate 31, inclosed in a casing 37w1th a transparent top 38.

The armature 32 is fastened to the upper in the magnetic field 33, which is composed of the windings 34 and the core 35 with an axial opening 36 mounted and securely side of the. frame 8,

extending therethrough, the diameter of this opening being slightly greater than the diameter of the rod 29. The entire unit is'carried in the usual manner on knife edges 39 formed on the frame 24 and restingin brackets of a support partially shown at 40.

In Fig. 5, we show diagrammatic-ally the method of electric compensation, and the connections. Similar parts in this figure and the other figures are indicated by the same characters.

A source of energy is shown at 41, the lead 42 connecting one end of the winding of the magnet 13 with the positive of the source of blocks 17 would cushion on .used toobtain the same of the electromagnet as described.

electrical energy and the lead 43 connecting the negative of the source of energy with the resistance coils 20, the latter being connected to the lead 43 in multiple. In a like manner te leads 44 and 45 perform a similar function. K

If for any reason whatever, the pivot 5 should be deflected from its position, the compensation on thatpivot will take place independently. This also applies to the compensation on the pivot 5 and in addi tion, to anytendency to deflect both pivots simultaneously. To evolve a compensation in the'magneticfield created by the magnet 33, a lead 46 is taken from the connection 47 and similarly a lead 43 is taken from the connection 49. If the sum of the resistances trical equilibrium and compensation is established.

We do not wish to limit ourselves to attraction magnets only, as it is obvious that repulsion or permanent magnets could be result. e claim: '1. In a gyroscopic compass the combination of a bearing; a yielding member supporting said bearing; magnetic means adapted to lessen the weight of said bearing on 1ts support; and automatic means associated with said yielding member adapted to control the action of saidmagnetic means, substantially as described.

Ina gyroscopic compass the combination of a gyroscopic disk; a frame provided with armatures and bearings for supporting said disk a second. frame provided with yielding members on which said bearings are pivoted; magnets supported by said second frame adapted to attract said armatures and thereby reduce the friction of said bearings; resistances under the control of said circuit through said reylelding members; a sistances and said magnets and means for supporting said second frame, substantially In witness whereof, we have hereunto set our hands this 24th day of April, 1912.

GEORGE AIRIOSSITER. EDWARD A. THORNE. Witnesses:

J. W. MANNEBAGH, WILLARD G. STANTON. 

